The comprehensive portrait presented in this book of changes in incomes, taxes, wages, employment, wealth, poverty, and other indicators of economic performance and economic well-being relies almost exclusively on data in the tables and figures. Consequently, the documentation of our analysis is essentially the documentation of the tables and figures. For each, an abbreviated source notation appears at the bottom, and complete documentation is contained in the Table Notes and Figure Notes that begin on page 367. (In some circumstances, however, we incorporate data in the discussion that are not in a table or figure.) This system of documentation allows us to omit distracting footnotes and long citations within the text and tables.